Sisymbrium genus --- mustard subfamily 2 -- Genus E to Z
Jim Hill mustard (Sisymbrium altissimum) -- in May -- Timber Trail, Lory State Park, CO yellow & orange
Jim Hill mustard (Sisymbrium altissimum) -- in May -- Prospect Ponds, Fort Collins Natural Area, CO
Jim Hill mustard (Sisymbrium altissimum) -- in May -- Mesa Trail, South Mesa Trailhead, Boulder County, CO
London rocket (Sisymbrium irio) -- in April -- Villanueva State Park, NM yellow & orange
flaxleaf plainsmustard (Sisymbrium linifolium) -- Dinosaur National Monument, CO yellow & orange
small tumbleweed mustard (Sisymbrium loeselii) -- in June -- Cherokee Park State Wildlife Area, CO yellow & orange